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CVE-2017-1000211

Status: ModifiedMedium (5.3)—

Lynx before 2.8.9dev.16 is vulnerable to a use after free in the HTML parser resulting in memory disclosure, because HTML_put_string() can append a chunk onto itself.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Lynx Project — Lynx

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2017-1000211",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": true,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2017-11-17T15:29:00.310",
  "references": [
    {
      "url": "http://lynx.invisible-island.net/current/CHANGES.html",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/102180",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/ThomasDickey/lynx-snapshots/commit/280a61b300a1614f6037efc0902ff7ecf17146e9",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2017/11/msg00021.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lynx.invisible-island.net/current/CHANGES.html",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/102180",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/ThomasDickey/lynx-snapshots/commit/280a61b300a1614f6037efc0902ff7ecf17146e9",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2017/11/msg00021.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Lynx before 2.8.9dev.16 is vulnerable to a use after free in the HTML parser resulting in memory disclosure, because HTML_put_string() can append a chunk onto itself."
    },
    {
      "lang": "es",
      "value": "Lynx en versiones anteriores a la 2.8.9dev.16 es vulnerable a un uso de memoria previamente liberada en el analizador HTML, lo que resulta en una fuga de información, ya que HTML_put_string() puede acoplarse un fragmento de información (chunk)."
    }
  ],
  "lastModified": "2026-06-17T00:58:54.947",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:lynx_project:lynx:2.8.9:dev15:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2AAE2892-65FB-44DC-8A93-578AD9C8F480"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}